Fuel and lubricating oil supply device

Abstract

A fuel and lubricating oil supply device, wherein lubricating oil for lubricating the wall surfaces of a combustion chamber of an engine is fed to the engine, together with fuel. This fuel and lubricating oil supply device comprises; a device for heating an air-fuel mixture charge, which heating device is provided in an intake passage in which an air-fuel mixture charge is produced; and a lubricating oil supply portion open to the intake passage in the downstream of the heating device, whereby a change in quality or deterioration due to heat, of lubricating oil is prevented.

What is claimed is: 
     
       1. In a fuel and lubricating oil supply device wherein lubricating oil for lubrication of the wall surfaces of a combustion chamber is fed, together with fuel, through an intake passage to said combustion chamber of an engine, the improvements comprising: heating means having a heating surface for gasifying fuel in a mixture charge provided midway in the intake passage through which a fuel and air mixture charge passes; and   lubricating oil supply means for mixing lubricating oil with said fuel and air mixture charge, said lubricating oil supply means being provided in the downstream side of said heating surface so that the lubricating oil is supplied free from contact with said heating surface.   
     
     
       2. A fuel and lubricating oil supply device as defined in claim 1, wherein said lubricating oil supply means at least includes a metering pump, and a lubricating-oil-injection nozzle, said injection nozzle being provided with an orifice. 
     
     
       3. A fuel and lubricating oil supply device as defined in claim 2, wherein said injection nozzle is provided with an air passage for introducing air from an air cleaner to said injection nozzle, such that a mixture of lubricating oil and air is injected through said injection nozzle into said intake passage. 
     
     
       4. A fuel and lubricating oil supply device as defined in claim 3, wherein said injection nozzle includes: a small through-hole open into said nozzle for allowing introduction of air from said air passage into said nozzle; an orifice provided in said nozzle on the side of said metering pump with respect to said small through-hole; and another orifice provided in said nozzle on the exit side of said nozzle, said another orifice being open to said intake passage. 
     
     
       5. A fuel and lubricating oil supply device as defined in claim 1, wherein an injection nozzle constitutes the lubricating oil supply means, and is provided with an air passage for introducing air from an air cleaner to said injection nozzle, whereby a mixture of lubricating oil and air is injected through said injection nozzle into said intake passage. 
     
     
       6. In a fuel and lubricating oil supply device wherein lubricating oil for lubrication of the wall surfaces of a combustion chamber is fed, together with fuel, through an intake passage to said combustion chamber of an engine, the improvements comprising: a heating device for gasifying fuel in a mixture charge provided midway in the intake passage, through which a fuel and air mixture charge passes; and   a lubricating oil supply device provided between said heating device and said combustion chamber, for supplying lubricating oil to said combustion chamber;   wherein an injection nozzle constitutes the lubricating oil supply device, and is provided with an air passage for introducing air from an air cleaner to said injection nozzle, whereby a mixture of lubricating oil and air is injected through said injection nozzle into said intake passage; and   wherein said injection nozzle includes: a small through-hole open into said nozzle for allowing introduction of air from said air passage into said nozzle; an orifice provided in said nozzle on the side of a metering pump with respect to said small through-hole; and another orifice provided in said nozzle on the exit side of said nozzle, which is open to said intake passage.